摘要
本文介绍了一种利用LNG冷能的空分装置新流程,其特征在于采用了由LNG冷能冷却的氮气内循环和氮气外循环低温压缩节流制冷系统、LNG的余冷冷却的氟里昂为载冷剂的压缩空气冷却系统和两段式LNG与循环氮气的热交换器。对不同工况的计算结果显示,生产每公斤液氧的能耗比不用LNG法节电60％-73.5％,理论上的节能效果优于在查阅文献和专利的其它方案。
A new air separation system by using cold energy of LNG was introduced in this paper. The main features of the system include: an inner nitrogen cycle cooled by cold energy of LNG and an outer nitrogen cycle cooled by a cryogenic compression refrigeration system are applied, the compressed air is pre-cooled by a freon coolant cooled by residual cool energy of LNG, and a twin zone heat exchanger between LNG and cycled nitrogen is applied. Simulation results based on different work conditions showed that the consumed electric energy produced 1 kg liquefied oxygen can be saved 60%-73.5% by the new system compared with conventional air separation systems without LNG, and the energy saving effectiveness is better than that of any method presented by other patents.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第6期913-916,共4页
Journal of Engineering Thermophysics
关键词
空气分离
LNG冷能利用
空气液化
液氧制造法
air separation
LNG cold energy recovering
liquefied air
production method of liquefied oxygen
